Do you ofter practise ()(swim)in summer?

Do you ofter practise ()(swim)in summer?
Do you ofter practise ()(swim)in summer?

Do you ofter practise ()(swim)in summer?
swimming
practice doing sth.练习某事

swimming

swimming
说明：
practise后接v-ing形式作宾语。

填swimming
practice doing为固定用法，表“练习做某事”，不可用practice to do